Liquid crystal compounds having a terminal 1-alkynyl residue

Details Liquid crystal compounds having a terminal 1-alkynyl residue Liquid crystal compounds having a terminal 1-alkynyl residue

1990-09-10

1992-12-15

Stoll, Robert L.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25229901, 25229963, 25229966, 585 25, 549369, 549372, C09K 1952, C09K 1930, C09K 1934, C07D31906, C07C 1513

Patent

active

051714736

ABSTRACT:
Compounds of the formula ##STR1## wherein n stands for the number 0 or 1; rings A, B and C each independently represent trans-1,4-cyclohexylene, trans-1,3-dioxane-2,5-diyl or unsubstituted or fluoro-substituted 1,4-phenylene; R.sup.1 denotes 3E-alkenyl with 4 to 12 carbon atoms, 4-alkenyl with 5 to 12 carbon atoms or, when ring A represents trans-1,4-cyclohexylene or trans-1,3-dioxane-2,5-diyl, also 1E-alkenyl with 2 to 12 carbon atoms; and R.sup.2 is hydrogen or C.sub.1 -C.sub.10 -alkyl,
their manufacture as well as liquid crystalline mixtures which contain such compounds and their use for electro-optical purposes.

REFERENCES:
patent: 4528114 (1985-07-01), Petrzilka
patent: 4613208 (1986-09-01), Boller et al.
patent: 4621901 (1986-11-01), Petrzilka et al.
patent: 4830470 (1989-05-01), Buchecker et al.
Mol. Cryst. Liq. Cryst., vol. 111, pp. 329-346 (1984).

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